Goodman gmp075-4 wont heat

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Old 12-08-17, 12:05 PM
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Goodman gmp075-4 wont heat

I can't this thing to fire up. I have replaced the gas valve i have replaced the board. I still get the ignition code error. I have tried a bunch of troubleshooting. The inducer come on and once up to speed the ignitor kicks on. During this time normally you can hear the gas kick on and the the flames come out. Im not getting any flame. The gas valve is getting the 24v duing the call for heat. I dont know a whole lot about this stuff or electricity. Any advice is appreciated. Im abiut to throw in the towel and get a new unit. This thing goes out every year.
 
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Old 12-08-17, 12:24 PM
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I show two wires on the gas valve. Blue is common (grounded) and purple is the 24vac. There should only be 24v on the purple line when the valve should be open..... not all the time. The igniter should preheat for approx 15 seconds before the gas turns on.
 
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Old 12-08-17, 03:47 PM
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Sorry yes. thats what i meant it shows 24v when the gas valve should be kicking on. It doesnt seem to be releasing the gas.
 
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Old 12-08-17, 06:00 PM
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If the old valve didn't work and you put a new valve in and have confirmed 24vc to it.....and it doesn't work either.... that would indicate no gas to the appliance or the orifices are completely plugged.
 
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Old 12-08-17, 07:02 PM
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I confirmed i have gas coming out before the valve. I don't think it safe to do it after the valve. .maybe tomorrow i will take it all apart again and check the tube after the gas valve
 
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Old 12-08-17, 09:09 PM
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What’s incoming and manifold gas pressure measure to?
 
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Old 12-10-17, 12:31 AM
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That, I have no clue. I think it's time to have someone come check things out.
 
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Old 12-13-17, 09:27 PM
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Dumb question but since you replaced the valve, did you reopen the shut off on the supply line?"
 
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Old 12-24-17, 09:11 PM
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Any updates with your issue?
 
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